What you do have going for you is that a typical retail shop is ~20'x60', or 1,200sf.  

I don't rely on them for 1-stop-shopping.

We are looking to redevelop vacant/partially leased shopping centers into a mix of apartments, retail, restaurants and/or office space.

In CA, the agent must be a party to the transaction, it's an allowed additional service, they cannot just hangout a lender's shingle or run an origination shop for the public.

Most reputable HML's require you provide a scope of work and use a licensed general contractor to assure the work is done in a workmanlike fashion and yes, you will have up front costs of an appraisal and credit report.

You may have to shop around, but, they are out there.  

Looking for a lender that would feel comfortable with the value of property I already own (free and clear)Current or prior ownership of real estate: Currently own - Current townhome $250-275k (free and clear), Investment commercial warehouse $300k (free and clear), 50% owner in out of state (South Carolina) single family home $275k (free and clear)Occupancy: Current townhome occupied by us, will list for sale once we move - Investment warehouse is fully rented - Out of State home used as vacation homeValue of property at present and/or your offer price: We're shopping for a home in the $400-425k price rangeAfter repair value: $400-425kAnticipated or actual appraisal issues: Actual valueCurrent rents per month: N/A - Will be personal home, not being rented outFair market rents per month: N/aDown payment or equity: We will put at least 20% down, probably $100-150k down paymentSource of down payment funds, if applicable: own fundsIncome Source: self-employed (Retail) and more recently landlordGross monthly income (optional): $7,668.00Monthly debt obligations appearing on credit report, plus (if applicable) personal rent and alimony/child support/etc:  Maybe $400/month at the mostFICO: Excellent - 814 (TransUnion) as of 12/18/18, 810 (Equifax) as of 12/18/18 (via Credit Karma)Credit issues: No credit issues. 

I am at the point where I rarely read something I do not already know or have learned several months earlier.Books take months on end between getting to press, printing, and distribution, so much so that by the time I may get one in my hand, it is already outdated information.Don't get me wrong, the education is key, I have an entire library, literally, in excess of 500 books, many on REI in some form or fashion.

How does one go about valuing shopping centers?

I don't know if the title company (adobe title) went out of business or if they just closed shop but they answer the phone by a different name.